一种页岩气井压后评估的远井可压指数评价方法  

The far-well fracability index method for shale well post-fracturing assessment

作　　者：苏瑗[1] 蒋廷学[1] 卞晓冰[1] 周珺[1] SU Yuan;JIANG Tingxue;BIAN Xiaobing;ZHOU Jun(SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China)

机构地区：[1]中国石化石油工程技术研究院,北京100101

出　　处：《石油化工应用》2019年第5期43-48,共6页Petrochemical Industry Application

基　　金：国家科技重大专项"彭水地区常压页岩气勘探开发示范工程";项目编号:2016ZX05061

摘　　要：页岩储层地质特征复杂、区域差异性明显,为取得较好的压裂改造效果,压前评价和压后评估均是必不可少的工作。对于页岩气井的压后评估工作,产能测试是压裂改造效果最为直观的表征手段之一,但是由于单井开发成本和经济性的要求,开展此项工作的页岩气井极为有限。因此,为了量化、便捷并准确的评价压裂效果和压裂施工措施适应性,在蒋廷学等提出的运用各压裂段的施工液量、砂量建立远井可压指数模型基础上,进一步对模型中参数的选取和计算方法进行改进,提升远井可压模型的准确率。通过实例验证,改进后的远井可压指数模型所计算得到的各段的可压指数可与产能测试结果符合率达80%以上,为压裂方案的制定和优化提供理论指导。The geological characteristics of shale reservoirs are complex and the regional differences are obvious.In order to achieve better fracturing reconstruction effect, pre-fracturing and post-fracturing assessment are both essential work.For post-fracturing assessment of shale gas wells,productivity testing is one of the most intuitive way to characterize the effect of fracturing reconstruction.However,due to the requirement of single well development cost and economy demand, shale gas wells which carrying out this work is extremely limited.Therefore, in order to assess the fracturing effect and the adaptability fracturing measure more quantify,convenient and accurate, based on the far-well fracability index method that first put forward by Jiang Tingxue, improve the selection of parameters in the model and calculation method, ascend the accuracy of new method.Through the example verification, the fracability index calculated by the improved method can reach a coincidence rate of over 80% with the productivity test results, providing theoretical guidance for the formulation and optimization of fracturing.

关 键 词：页岩 压后评估 脆性 可压性 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]